function validate_required(field,alerttxt){
     with (field){
          if (value==null||value=="")
              {alert(alerttxt);return false;}
          else {return true}
     }
}

function validate_form(thisform){
     with (thisform){
     if (validate_required(fullname,"Full Name must be filled out!")==false)
          {email.focus();return false;}
     }
}